package com.wfh.blog.web.admin;

import com.wfh.blog.po.Type;
import com.wfh.blog.service.TypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TypeController {
    @Autowired
    private TypeService typeService;

    //分页查找全部 根据id排序
    @GetMapping("/types")
    public String types(@PageableDefault(size = 5,sort = {"id"},direction = Sort.Direction.DESC)
                                Pageable pageable, Model model) {
        model.addAttribute("page",typeService.listType(pageable));
        return "admin/types";
    }

    //跳转到新增页面
    @GetMapping("/types/input")
    public String input(Model model) {
        model.addAttribute("type", new Type());
        return "admin/types-input";
    }

    //新增页面中的提交方法
    //BindingResult result 获取校验过的结果
    @PostMapping("/types")
    public String post(@Valid Type type,BindingResult result, RedirectAttributes attributes) {
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1 != null) { //已经存在这样的分类名称
            result.rejectValue("name", "nameError","不能添加重复的分类");//往验证结果中加入错误 1.验证name值 2.自定义字符串 3.最终返回的消息
        }
        if (result.hasErrors()) {//有错误，校验没通过
            return "admin/types-input";
        }
        Type t = typeService.saveType(type);
        if (t==null) {
            //提示错误信息
            attributes.addFlashAttribute("message","新增失败");
        }else {
            //提示成功信息
            attributes.addFlashAttribute("message","新增成功");
        }
        return "redirect:/admin/types";
    }

    //根据id跳转到编辑标签页面,与新增共用一个页面
    @GetMapping("/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        model.addAttribute("type", typeService.getType(id));
        return "admin/types-input";
    }

    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result,@PathVariable Long id, RedirectAttributes attributes) {
        Type type1 = typeService.getTypeByName(type.getName());
        if (type1 != null) {
            result.rejectValue("name","nameError","不能添加重复的分类");
        }
        if (result.hasErrors()) {
            return "admin/types-input";
        }
        Type t = typeService.updateType(id,type);
        if (t == null ) {
            attributes.addFlashAttribute("message", "更新失败");
        } else {
            attributes.addFlashAttribute("message", "更新成功");
        }
        return "redirect:/admin/types";
    }

    //根据id删除分类
    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes) {
        typeService.deleteType(id);
        attributes.addFlashAttribute("message", "删除成功");
        return "redirect:/admin/types";
    }
}
